Error Code [205] (Short Circuit In 2-Stage Relief Solenoid) - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING

Error code [205] (Short circuit in 2-stage relief solenoid)

User code Error code
– 205
Contents of
• When the signal is output to the 2-stage relief solenoid circuit, an abnormal current flows.
trouble
• Turns the output to the 2-stage relief solenoid circuit OFF.
Action of
• Even if the cause of the failure disappears, the system does not reset itself until the starting switch is
controller
turned OFF.
Problem that
• The one-touch power maximizing function does not work (The main relief valve is not set to high pres-
appears on
sure).
machine
Related • The operation state (ON/OFF) of the 2-stage relief solenoid can be checked with the monitoring func-
information tion. (Code: 023, Left of upper line)
Defective 2-stage relief
1 solenoid (Internal short cir-
cuit)
Short circuit with chassis
Possible causes
ground in wiring harness
and standard
2
(Contact with ground cir-
value in normal
cuit)
state
Defective governor and
3
pump controller
20-324
(1)
Short circuit in 2-stage relief solenoid
Trouble
(Governor and pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between (2) and chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between C03 (female) (28) – V06 (female) (1)
wiring harness and chassis ground
aPrepare with starting switch OFF, then turn starting switch ON and car-
ry out troubleshooting.
Between (37) and
chassis ground
V06 (male)
Between (1) and (2)
One-touch power max-
C03
imizing switch
Released
Kept pressed
[205]
Resistance
20 – 60 z
Min. 1 Mz
Min. 1 Mz
Resistance
Voltage
Max. 1 V
20 – 30 V
(With 8.5-sec timer)
PC130-7